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Infection, not allergy, appears to be the most common cause of acute urticaria in children. In a review of 76 cases, an association with infection was documented or suspected in 60% of cases-half of these viral. An aggressive diagnostic approach may prevent unwarranted lifelong dietary and drug restrictions or reveal a potentially serious disease, such as streptococcal pharyngitis.
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Diane E. Schuller (1982) studied this question.
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